Design of Robust CMOS Amplifiers Combining Advanced Low-Voltage and Feedback Techniques

João Carlos da Palma Goes, DEE Group Author

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Citation (Scopus)


This paper describes and tries to demystify the use of different low-voltage operation devices, such as dynamic threshold MOS transistors (DTMOS) with feedback techniques such as regulated-feedforward (RFF) and self-biasing (SB). Traditionally, DTMOS devices are only used when nominal supply voltages below 0.7 V are envisaged. Moreover, RFF and SB techniques are normally avoided since engineers designing high-performance amplifiers are afraid of additional stability concerns. This work demonstrates, through exhaustive simulation results over process, temperature and supply (PVT) corners using a standard 130 nm 1.2 V CMOS technology that, employing DTMOS in some specific devices can improve some performance parameters such as the open-loop low-frequency gain and, simultaneously, reduce significantly the variability over PVT corners. Moreover, it is also demonstrated that, there is no risk of operating at supply voltages higher than 1.2 V. Combining DTMOS with RFF and SB allows achieving reasonable gain-bandwidth products (GBW) even operating at low-voltage (down to 0.7 V), together averaged power savings of the order of 8% and highly simplifies the design of the circuit (since no biasing circuitry is required).
Original languageUnknown
Title of host publicationIFIP Advances in Information and Communication Technology
Publication statusPublished - 1 Jan 2012
Event3rd IFIP/SOCOLNET Doctoral Conference on Computing, Electrical and Industrial Systems -
Duration: 1 Jan 2012 → …


Conference3rd IFIP/SOCOLNET Doctoral Conference on Computing, Electrical and Industrial Systems
Period1/01/12 → …

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